Will a Esp8266 work on a uno r3 without resistors?
This is the one I am using the ESP-01 I don't really want to buy the board to go with it if I don't need it.
Thanks in advance. similar to the below is what I have.
Will a Esp8266 work on a uno r3 without resistors?
This is the one I am using the ESP-01 I don't really want to buy the board to go with it if I don't need it.
Thanks in advance. similar to the below is what I have.
The ESP-01 is officially a 3.3v device, but I've heard of people just hooking them up straight to the 5v pins (maybe powered by the 3.3v Uno pin, not sure). To be safe you'll probably need a level-shifter though.
But you don't actually need a Uno for it.
I'm currently using one as a data logger, standalone, in a little tictac case:
The biggest limitation is that it only has one easy to use GPIO pin. Two with a little more effort, and I think 4 with a fair bit more effort.
I'm just using it with a Dallas 1-wire temperature sensor, and it calls a simple php script on my server that updates a basic text file. With a bit of magic, I'm getting real-time graphs of the temperature I'm tracking. I just put that together last night - went quicker and turned out nicer than I had intended!
ps, the dip in temperature is when the heater and datalogger got unplugged for 25 minutes. Oops! but it was easy for me to detect and fix (ie, plug it in again), due to this data logging!
You can also get other ESP8266 boards that have far more GPIO, like the WeMos D1-mini or the Witty. Each is about $5 on eBay. Or for about $7 (CAD) you can get a Sonoff which can also be programmed like an ESP8266 but it already has a power supply, case, and relay. Adafruit has the Huzzah for more, but it seems to do about the same thing - maybe better quality and better support though. (I have one of each of the aforementioned items on order, to try them all out 
)
edit: I forgot to mention that they are all programmable with the Arduino IDE. The ESP-01 is more difficult because you'll need a USB-serial adapter and a few extra hookups. That all said, it will probably make a very nice WiFi add-on to a Uno as well, and much easier to program that way.
Cheers,
-Nico
The ESP-01 is officially a 3.3v device, but I've heard of people just hooking them up straight to the 5v pins (maybe powered by the 3.3v Uno pin, not sure). To be safe you'll probably need a level-shifter though.
But you don't actually need a Uno for it.
I'm currently using one as a data logger, standalone, in a little tictac case:
The biggest limitation is that it only has one easy to use GPIO pin. Two with a little more effort, and I think 4 with a fair bit more effort.
I'm just using it with a Dallas 1-wire temperature sensor, and it calls a simple php script on my server that updates a basic text file. With a bit of magic, I'm getting real-time graphs of the temperature I'm tracking. I just put that together last night - went quicker and turned out nicer than I had intended!
ps, the dip in temperature is when the heater and datalogger got unplugged for 25 minutes. Oops! but it was easy for me to detect and fix (ie, plug it in again), due to this data logging!
You can also get other ESP8266 boards that have far more GPIO, like the WeMos D1-mini or the Witty. Each is about $5 on eBay. Or for about $7 (CAD) you can get a Sonoff which can also be programmed like an ESP8266 but it already has a power supply, case, and relay. Adafruit has the Huzzah for more, but it seems to do about the same thing - maybe better quality and better support though. (I have one of each of the aforementioned items on order, to try them all out )
edit: I forgot to mention that they are all programmable with the Arduino IDE. The ESP-01 is more difficult because you'll need a USB-serial adapter and a few extra hookups. That all said, it will probably make a very nice WiFi add-on to a Uno as well, and much easier to program that way.
Cheers,
-Nico
